Earlier quoted context omitted.
Hazarding a guess here: because some of us might enjoy different colors and fonts?
I used to change themes a lot back in the day ; now I just wish for a usable desktop that doesn't get in my way, and Gnome / KDE are awful from that point of view. That's the reason why I'm developing software on Linux, but dual-boot in a Windows 7 partition for design-related work, as that requires mouse-based interactions, and in Gnome I can't even rely on copy/paste to work properly. Changing themes and fonts is n…
For me priorities would be having basic
functionality, like copy/paste, working properly
It really should work. Since ages. Care to elaborate where copy and paste doesn't work in Gnome? Cause that's really a bug. or how about a task-switching applet (activated
on alt-tab) that can use the mouse to select the
window you want;
You can do that with Gnome 3. Press Alt-Tab, hold down Alt and click around to your app. Works like a charm here. or desktop notification windows that you can
close (those notifications in Ubuntu are really
obnoxious)
In Gnome 3 (and also Gnome 2 fwiw) you can close the notifications by clicking on them. But even better, in Gnome 3 you can set yourself as busy (click on your name in the top-right corner and select "Busy") so notifications will stay silent in the hidden notification area and won't disturb you.